The Ancient Egyptian necropolis consists of the Pyramid of Khufu, the somewhat smaller Pyramid of Khafre (or Kephren), and the relatively modest-sized Pyramid of Menkaure (or Mykerinus), along with a number of smaller satellite edifices, known as queen' pyramids, and the Great Sphinx. Of the three, only Khafre's pyramid retains part of its original polished limestone casing, towards its apex. Interestingly this pyramid appears larger than the adjacent Khufu pyramid by virtue of its more elevated location, and the steeper angle of inclination of its construction -- it is, in fact, smaller in both height and volume. The most active phase of construction was in the 25th century BC. *** 1) The Great Pyramid of Giza is the oldest and last remaining of the Seven Wonders of the World and the most widely recognized pyramid in the world. Though no pharaoh has ever been found buried in an Egyptian pyramid, it is presumed by traditional egyptologists to have been built as a tomb for the Fourth dynasty Egyptian king Khufu (also known under his Greek name Cheops), after whom it is often called Khufu's Pyramid or the Pyramid of Khufu. The architect of the pyramid was Hemon, a relative of Khufu. The most widely accepted estimate for its date of completion is 2580 BC. *** 2) Khafre's Pyramid is the second largest of the ancient Egyptian Pyramids of Giza and the tomb of the 4th-Dynasty Pharaoh Khafre. The pyramid is believed to have been completed around 2532 BCE, at the end of Khafre's reign. It lies a few hundred meters southwest of its larger neighbor, the Great Pyramid of Khufu *** 3) Menkaure's Pyramid, is the smallest of the three Pyramids of Giza. It was built to serve as the tomb of the 4-Dynasty Egyptian Pharaoh Menkaure. The pyramid's date of construction is unknown, because Menkaure's reign has not been accurately defined, but it was probably completed sometime during the 26th century BC. It lies a few hundred metres southwest of its larger neighbors, the Pyramid of Khafre. Source: http://en.wikipedia.org/wiki/Pyramids_of_Giza